Grinding-mill.



E. UTZ.

Patented June 29, 1909.

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E. UTZ.

GRINDING MILL.

APPLICATION FILED 1330.30, 1907.

Patented June 29, 1909.

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E. UTZ.

GRINDING MILL.

APPLICATION FILED DEC.30.1907.

Patented June 29, 1909.

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E. Utz

MMA

' /1 TUHNEVS unirse lilllL LITZ, OI" WlGlll'lA, KANSAS.

GRIN DING-MILL.

Specification of Letters Patent.

Patented June29, 1909.

Application filed December 30, 1907. Serial No. 408,685.

T o all who/m. it may concern.: l

Be it known that l, EMIL lTZ, a citizen ot the United States, residing at Wichita, in the State of Kansas, have invented a certain new and useful Grinding-Mill, of which the l'ollowing is such a full, clear, and exa-ct description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this spec-iication.

My invention relates to grinding mills such as are used for grinding grain, coiiee, spices, wheat and the like.

The object of my invention is to provide an im rovcd construction of grinding` mill where y the grinding' cylinder or bur and the breast or concave can be readily inspected for adjustment or repair.

Another object of my invention is to provide improved means for adjusting the breast or concave so as to regulate not only the lineness of ythe material to be ground but also the rate of grinding.

In the accompanying drawings which illustrate one form of mill made in accordance with my invention, Figure l is a vert-ical sec? tion on the line 1-1 ot Fig. 2, Fig. 2 is a side elevation and Fig. 3 is a top plan view, the up erypart ol' the casing being removed.

like marks of reference refer to similar' parts in thc several views of the drawings.

5 is the base plate which is preferably formed integral with the lower part 6 of the casing. The lower part 6 of the casing of I'ovided with extensions 7 forming the lower lialves of journal boxes in which is carried the shaft 8 ot the grinding cylinder or bur. The u per portions 9 of these journal boxes are helJd in )osition by means of bolts 10 and are pretera ly provided with oil holes 11. The grinding cylinder or bur is composed olI a number of toothed disks 12 surrounding the shaft 8 and secured in position between the collar 13 and the nut 14 on the said shaft. The upper portion 15 of the casing is secured in position upon the lower portieri by means of bolts 16. The u )per portion 15 ot the casing is provided with an upward extension 17 forming a feed chute. 'l iis feed chute 1.7 is adapted to be cut oil from the interior of the casing by means of a slide `19.

The lower-"portion 6 of the casing is provided at one side with an u iwardly extending semi-circular portion 20 which lits into acorrespondingr recess in the upper portionl 15. Formed in this upwardly extending portion 2() is a vertical slot 21 through which passes a clamping stein 22 carrying thc concave or breast 23. This concave or breast 23 has its face provided at its lower part with teeth 24 but smooth upon its upper part 25 as shown in Fig. 1 of the drawings. The lower edge of the concave or breast is provided with feet 26 which rest upon the bottom of the interior of the casing. ln order to adjust the concave 23, I provide the upwardly extending portion 20 of the lower part of the easing with a set screw 27 forming an adjustable abutment for the upper portion of the concave 23. The lower ortion of the casing 6 also carries a pair ot set screws 28 which form adjustable abutments for the lower portion of the-said concave. The clamping stem 22 hereinbefore referred to, after passing through the slide 21, is provided on its end with a nut 29 by means of which the concave is clamped firmly in position after being adjusted by the set screws 27 and 2S.

ln the operation of my mill, power' is supplied to the shaft in any suitable manner and the grain or other material to be ground is fed into the chute 17, the slides 19 being, of course, withdrawn. The grain passes into the space between the cyhnder 12 and the concave 23 and is ground by the combined action of the teeth of the cylinder and concave. By means ot the set screws 2S, the lower toothed portion of the concave can be adjusted toward and away from the cylinder so as to regulate the lineness to wlnch the grain or other material is ground. At the same time, by means ol" the upper set screw 27 the upper. smooth portion of the concave can be inde iendently adjusted toward and away from t ic cylinder so as to regulate the amount olI material 'ted to thegrinding portion.

The slide 1Q, it is to be understood, is used only to eut oli' the supply of material from the mill and not to regulate the amount of feed. By my construction we are enabled to readily adjust the two portions of the concave independently toward and away from the grinding cylinder and at the same time to always have the lower edge ol' the concave supported by the casing so that the tendenc to rotate the concave around the shaft S will not disturb the adjustment nor injure the l parts by which the adjustment is obtained.

It will be evident that b removing the upper portion of the casini@r t e cylinder and concave are readily accessible for repairs.

Having fully described my invention, what 5 I elaixn as new and desire to secure by Letters Patent of the United States is:

In a grinding mill, the combination With a casing, of a grinding Cylinder' in said easing, a breast for said cylinder, independently ad- 10 justable upper and lower abutments for said breast, and a clam ing stem carried by said breast and vertical y movable in said easing. i In testimony whereof I have hereunto set my hand and affixed my seal in the presence of the two su bseribing Witnesses.

EMIL UTZ. [L. s]

IVitnesses:

B. T. HARRISON, J. L. STINGLEY. 

